Lubricator



1. ERICKSON.

LUBRICATOR. APPLICATION FILED DEC. I6, I9I9.

Patented June 21, 1921.

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PATENT OFFICE.

JOHN ERICKSON, OF MADISON, WISCONSIN, ASSIGNOR T0 MADISON KIP? CORPORA.- v'.lflfJN, 0F MADISON, WISCONSIN, A CORPORATION OIE WISCONSIN.

LUBBICATOB.

Specification of Letters Patent.

Patented Juneei, 1921.

Application fixed December 16, i919.- seriai No. 345,203.

To all w71 om t may concern: v

Be 1t known that I, JOHN EmonsoN, a citizen of the United States, residinvr at Madison, in the county `of Dane and btate of Wisconsin, have invented certain newV and useful Improvements in Lubricators, of which the following is a specification.

This invention pertains tol lubricators, and

more' particularly to those of the force feed type. l

-or closed position Fig. 2 is a similar view with the parts so positioned that the lubricant may be introi duced into the same preparatory to its being forced to the part to be lubricated; and

Fig. 3 a transverse horizontal section taken on the line III-III of Fig. 1.

ln said drawings, 1 denotes the main bodyv of the structure, the lower end 2 of which is threaded for attachment to the part to be wall t lubricated. Said body adjacent said threaded end is formed with a hexagonal or nutshaped portion Sto facilitate the securing of the'structure in place. The body is circular in cross section and .a cylindrical chamber 4 extends from the top thereof throughout its major portion, said chamber at its lower end opening into a somewhat smaller bore or passage 5. The lower end of the body is counterbored as at 6, and a valve 7 is' placed therein and held to a seat formed at the lower end of the passage 5 by a spring 8. A perforate disk or washer 9 is secured in the lower end of the threaded extension 2 and maintains the spring in place, the spring being placed undera slight degree of compression to normally hold the valve closed. The lubricant 'is introduced into the cylinder throu h an opening 10 formed in the side ereof.

Mounted for reciprocation within the cylinder is a piston 11, said piston being hollow and having an opening ormed centrally in its upper end. Upward movement of the piston is limited by a stop ring l12 formed of spring wire and sprung into a groove fornied 1 n the inner wall of the body. EX- tendlng into the upper end of the piston is an actuating rod or piston stem 13, the lower end whereof is provided with a head 1.4, the head being of such diameter that while it may have afree movement endwise within the pistonit is prevented from being drawn out thereof lby the inwardly projecting l 15 formed on the piston. The pistou, rod 11i extends upwardly through a guiding washer 1 6 .secured in the upper end of the bodv 1. Sald rod has secured to it a washer 17, 'and a spring 18 encircling the stein and bearing at its opposite ends against the washers, acts `to force the piston rod downwardly. En-

circling the body and making. a close sliding fit therewith is a sleeve-like closure member'19, the upper end whereof is fastened to the upper end of the rod 18, as by heading the reduced upper end thereof over the u pper closed end of the sleeve. A small opening 20 is provided in the head of the sliding closure or sleeve 19 to permit the ingress and egress of air. into and from the space between the sleeve and the upper end Vof body 1.

' With the parts in the position shown in Fig. 1, the piston is down and the sleeve 19 closes the opening 10. When it is desired to introduce the lubricant the user will grasp the sleeve 19 and draw the saine upward. During the first portion of the movement the rod 13 and its head 14 will move upwardly independent of the piston 11, and the spring 18 will be placed under partial compression. Continued movement will cause engagement of head 14 with lip 15 and the piston will be carried to the position shown in full lines in Fig. 2, .the lower end of the sleeve liklewiise passing above the opening 10. Lubricant will then be introduced into opening 10 into the cylinder and beneath the piston. Upon release of the sleeve, spring-18 will force the sleeve and rod 13 downwardly, the sleeve closing the opening 10 and the head 14E coming into contact with the piston 11 (see dotted lines, Fig. 2) and upon continued downward movement of said sleeve and rod either through the action of spring 18 or force applied manually to the sleeve the piston will be moved downwardly in the cylinder forcinr the lubricant therefrom past the valve l to the part to be lubricated. It will thus bc seen that the piston has a lost motion connection with reference to the rod and the sleeve for closing the feed port or opening l() and that the piston does not come intoy operation until said opening is closed. inasmuch as the sleeve or closure makes a close fit with the body 1 the `lubricant cannot pass outwardly through the opening l() but-is constrained to unseat valve 7 and pass to the part to be lubricated.

The structure is especially adapted for use upon automobiles or motors and as will be readily appreciated may he employed in any position.

What is claimed 1s: 1. In a lnbrlcator, the combmation oi a cylinder having a feed and a dischargeport a piston mounted therein; a closure member for the feed port mounted on the body;

- withsaid closure member, said rod likewise and a piston rod attached to and movable having' a lost motionconnection with the piston, whereby the closure member may first move lengthwise of the cylinder to close the feed port and the rod at the same time-likewise moved without actuating the piston.

2. Ina lubricator, the combination of a' cylinder having a lateral feed opening and a discharge opening; a piston mounted within said cylinder; a sleeve mounted exteriorly, of the piston and adapted to close the feed opening; a post or fred connected `at one end to said sleeve;l a lost motion connection between the other end of the rod and the piston; and a spring acting to force the rod and sleeve downwardly.

3. In alubricator, the combination cfa cylinder having a lateral feed opening and a discharge port at its lower end; a sleeve Slidably mounted on the exterior of said cylinder and adapted to close the feed opening; a piston mounted 1n the cyllnder; a

piston rod connected at one end to the upper portion of thel sleeve; a lost motion connection between the piston and the inner end vopening.

4. ln a lubricator, the combination of a cylindrical body vportion having a lateral feed opening and a discharge port at its lower end; a hollow piston mounted therein; a piston rod mounted in the upper pertion of the body with its upper end extending above the same and its lower end extending into the hollowpiston; a head on said lower end; an inwardly extending lip on theupper end of the piston preventing withdrawal of the head from the piston while permitting lrelative movement between said rod and piston; a spring acting to force the rod downwardly; and a sleeve "mounted to slide'on the outer face of the 5. In a lubricator, the combination of a. .cylindrical body portion having a lateral feed opening and a dischargeport at its lower end; a hollow iston mounted therein; a stop ring mounte in the body above the piston and serving to limit the upward movement of thc piston; a piston rod mounted in the upper. portion ofthe body with its upper end extending above the same and its lower vend extending into the hollow piston; a head on said lower end; an inwardly extending lip on theupper end of the piston preventing withdrawal of thef head from the piston while permitting relative movement between said rod and piston; a spring acting to force the rod downwardly; and a sleeve mounted to slide on the outer face of the cylinder, said sleeve being attached to the upper end of the piston rod and movable therewith.

In-testimony whereof I have signed my name to this specification.

JOHN ERICKSON. 

